MC68HC908KX8 Datasheet, PDF (261/310 Pages) Motorola, Inc – Microcontrollers

Monitor ROM (MON)
Baud Rate
18.9 Baud Rate
The communication baud rate is controlled by the CGMXCLK frequency
output of the internal clock generator module.
18.9.1 Force Monitor Mode
In forced monitor mode, the baud rate is fixed at CGMXCLK/1024. A
CMGXCLK frequency of 4.9152 MHz results in a 4800 baud rate. A
9.8304-MHz frequency produces a 9600 baud rate.
18.9.2 Normal Monitor Mode
In normal monitor mode, the communication baud rate is controlled by
the CGMXCLK frequency output of the internal clock generator module.
Table 18-3 lists CGMXCLK frequencies required to achieve standard
baud rates. Other standard baud rates can be accomplished using other
clock frequencies. The internal clock can be used as the clock source by
programming the internal clock generator registers however, monitor
mode will always be entered using the external clock as the clock
source.
Table 18-3. Normal Monitor Mode
Baud Rate Selection
CGMXCLK Frequency
(MHz)
9.8304
Baud Rate
9600
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
Monitor ROM (MON)
Technical Data
261